If you have any questions about the rules of the jam that are not answered below feel free to ask them in this thread and I will get back to you as soon as I can!

When can I start working on my game?

Your game, including all assets outside of the resource page, should be made within the jam’s duration.

Does my game have to run on a real Nokia 3310?

Nope! We're just using the restrictions as a design space.

Can I make my own engine?

Yes! Many participants have done this. Feel free to make the framework before the jam begins. Just make sure it doesn’t put you ahead of other people using pre-made engines.

How do I make my game as accurate as possible to the Nokia 3310?

None of the following is necessary to submit a game and it won’t improve your score. This is for those who want to go the extra mile. Game fps should be 15. As pointed out by hoaniware in the comments below, the screen the Nokia 3310 used (PCD8544) was capable of up to 67hz so you can set your FPS to anything 67fps and below, whatever you feel emulates the 3310's screen responsiveness best. Ensure you are not using more "modern technology" like physics engines, 3d graphics, etc. The simpler the better. You could simulate the LCD's ghosting. The Nokia 3310’s screen also did not use perfectly square pixels. Each pixel was likely a 3:4 / 7:9 ratio.

  The Nokia 3310 was incapable of sub-pixel movement and sub-pixel scrolling so it is NOT allowed. This means all pixels must be perfectly aligned with the pixel grid. There should be no half-pixels even while moving. The ultimate challenge would be to get your game running on a real Nokia 3310!

Only 12 controls are allowed but the Nokia 3310 has 16 buttons.

The jam excludes the 4 menu buttons as they were usually used to navigate menu's and not play the actual game.

Can I mix and match the three color palettes? 

No. You should be selecting one option and making your whole game with your selection. Palette swapping is allowed if it is an option/setting and not part of gameplay.